p.s. is it a laptop or pc?
before trying to do any cleaning or tinkering with the inside of the machine, unplug it from the wall and then remove excess voltage by using the
unplugged electrical cord end, and rub it on the back of the computer case where it originally plugged into it. look up how to ground yourself from
any potential power still existing in an unplugged machine, so you don't get electrocuted
may need to clean the various parts of the machine, including the cpu processor, cpu fan and ram sticks. but to do that, you have to take it apart.
one of the problem is, once you remove the cpu fan section, it may bring the cpu up with it, thus revealing the cpu processor section that attaches
the cpu itself (and attached cpu fan) to the motherboard and it contains a hundred or so prongs that have to line up precisely when reinstalled into
the motherboard. if not reinstalled correctly the pins bend and then the thing won't turn on. and you have to sit with a tiny object and straighten
out every bent pin, which can take more time than most are willing to do. it's very tedious and frustrating. have to make sure the release lever for
the cpu process unit is in the release position when putting it back in.
on top of that, you may need new thermal paste between the cpu fan and the cpu. if they are stuck together by the thermal paste, it's probably best to
leave it that way, although sometimes someone has put too much thermal paste between the cpu and the cpu fan and it negatively impacts the ability of
heat sink transference of heat. too much thermal paste and not enough heat transference and thus the cpu processor and the motherboard overheat. not
enough thermal paste and same problem.
if it's your graphics card, remove the side of the computer and turn the computer on to see if the fan on the graphics card is moving, if not, the
only solution i know of, short of buying a new graphics card, is to keep the side of the computer case off, and use a house fan to keep the inside of
the machine cool. the problem here is air flow issues. if you direct the air flow in the wrong way, it can trap hot air inside the case, so the
house fan has to be directed inside the case at an angle so the air inside will be redirected outside of the case. the other potential problem with
the graphics card is if someone removed it and plugged it back in incorrectly. there's a little cord that comes out of the graphics card unit and
typically has more than one slot it can plug into. if plugged into the wrong socket, it won't work.
could be the power supply. if blowing it out with compressed air for that purpose, you're still not getting power, you may need to replace the power
supply. you need to know what type of power supply that particular computer needs.
on the outside / back of the machine is a little switch, typically directly below where you plug the power cord into the machine case. if the voltage
doesn't match your power supply, it can keep the machine from turning on.
there's also a tiny thing called a jumper. every machine is different, so the settings for the jumper may be different. make, year, model of the
machine usually will reveal if the jumper is there, what you need to do to reset it and etc. this part is very painstaking and specific. almost as
bad as straightening out bent pins. this resets the bios. there's a way to manually reset bios without even being logged into windows or messing
with the machine, but i don't recall what it is and it may be different, depending your comp specs. you can probably google it by asking for manual
it could take a week or more to fix it yourself, only to find out some part is irreparably broken, so proceed with the understanding of your time
and whatever you do, don't follow any of my advice if you have an official guide for your computer type to follow. they will have the most relevant
and up to date information.
edit on 26-1-2014 by undo because: (no reason given)